从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21．—Would you like another egg?
— .
A．Yes, I'd like B．I wouldn't say no C．I wouldn't like D．No, I don't like
22．My teacher asked me to copy _____ article _____ second time．
A．an; the B．an; a C．the; a D．the; the
23．_____ what has recently been done to provide more buses for the people, a shortage of public vehicles remains a problem．
A．Except for B．Due to C．Because of D．In spite of
